Test 2: Force on Conductors, Turning Effect, Motor

Question 1

A current-carrying conductor placed in a magnetic field experiences a:

• Aforce
• Bchange of colour
• Cno effect
• Dchange of mass

Question 2

The force on a current-carrying conductor in a magnetic field is always at right angles to:

• Aonly the current
• Bonly the field
• Cboth the magnetic field and the current
• Dneither

Question 3

The force on a current-carrying wire in a magnetic field becomes stronger if:

• Athe current increases
• Bthe wire is removed
• Cthe magnet is weakened
• Dthe length inside the field is reduced

Question 4

The magnitude of force on a conductor is given by:

• AF = ILB sin(theta)
• BF = I/LB
• CF = IL + B
• DF = B/IL

Question 5

The direction of force on a current-carrying conductor in a magnetic field is determined by:

• AFleming's left-hand rule
• Bright-hand grip rule only
• COhm's law
• DCoulomb's law